Rio de Janeiro's top samba schools danced and sang hard Monday as millions of other Brazilians did the same during nationwide Carnival celebrations. (Photo: AFP)

Revellers of the Uniao da Ilha samba school perform during the second night of Rio's Carnival at the Sambadrome in Rio de Janeiro, Brazil, on February 12, 2018.Brazilians loaded up on spirits and hit the beaches, public squares and streets for huge "blocos," or street parties, in many locales under a penetrating tropical sun common during the sweaty summer month of February. (Photo: AFP)

A reveller of the Uniao da Ilha samba school gets ready to perform during the second night of Rio's Carnival at the Sambadrome in Rio de Janeiro, Brazil, on February 12, 2018. Rio's leading samba schools gave it their all at the Sambadrome, where they paraded 700 meters while thousands looked on.(Photo: AFP)

Revellers of the Unidos da Tijuca samba school perform during the second night of Rio's Carnival at the Sambadrome in Rio de Janeiro, Brazil, on February 12, 2018. The gay rights organization Gay Group of Bahia hosted its annual LGBT Costume Contest in Salvador, including performances that highlighted Brazil's high rates of violence against women and gay and transgender people.(Photo: AFP)

Revellers of the Mocidade samba school perform as the sun rises after during the first night of Rio's Carnival at the Sambadrome in Rio, Brazil, on February 12, 2018. Women's groups have also been using Carnival as a time to highlight and push back against sexual harassment. Several block parties have feminist themes.(Photo: AFP)

A reveller of the Sao Clemente performs on the first night of Rio's Carnival at the Sambadrome in Rio de Janeiro, Brazil, on February 11, 2018. In Rio, the celebrations come during a time of unease, as the city that hosted the 2016 Summer Olympics is experiencing a surge in violence.(Photo: AFP)

Performers from the Uniao da Ilha school parade on a float during Carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, early Tuesday, Feb. 13, 2018. Despite the problems, most revelers were enjoying the party, which officially goes through Tuesday but for many stretches deeper into the week.(Photo: AP)

A reveller of the Grande Rio samba school performs during the first night of Rio's Carnival at the Sambadrome in Rio de Janeiro, Brazil, on February 12, 2018. (Photo: AFP)